Hyun-Ho Shin

In-Plane Switching Technology for Liquid Crystal Display Television

In-plane switching (IPS) technology used for liquid crystal display (LCD) TV is reviewed. Requirements of HD TV application are listed, and the main performances are compared among various competing display technologies. IPS LCD mode shows superior performances, satisfying the requirement for HD TV application.

Auto‐stereoscopic 60 view 3D using slanted lenticular lens arrays

Abstract A natural 3D image is considered by many people to be next‐step in evolution of displays. This paper introduces autostereoscopic 3D of 60‐view number, which is made using slanted lenticular lens array and LCD of 15.1 inch diagonal size and 3200 by 2400 pixel numbers and presents the results of our prototype. Due to its large view number, smooth motion parallax is observed and the visual fatigue is reduced.

Autostereoscopic multi-view 3D display with pivot function, using the image display of the square subpixel structure

Abstract We designed an autostereoscopic multi-view 3D display that has pivot function. Slanted parallax barrier and the image display with subpixel structure of the square shape is used. Subpixels corresponding to each viewing zone show the tendency of the uniform distribution for odd view number in case of the optical elements of the slanted angle of arctan(1/2) or (1/3). Due to the square subpixel shape, large change of zone distance can be prevented under 90 rotation of the display. By optimizing the slanted angle of the optical element and the zone distances, conditions were found where 3D subpixels are uniformly distributed and zone distance is smaller than the interocular distance at the portrait mode as well as at the landscape mode. 3D prototype was fabricated using LCD of 15-in. diagonal size and luminance distribution for each viewing zone was measured under 90-degree rotation. 3D performance under 90-degree rotation was verified by displaying 3D images of the different amount of the disparity.

LCD TV comparable to CRT TV for moving image quality: world's best MPRT LCD TV

The worlds best motion fidelity LCD, which is based on scanning backlight technique, was developed. The MPRT (Motion Picture Response Time) of 4.0 ms for an LCD is achieved while a CRT has about 3.7 ms and a PDP still has about 8.1 ms. It means that the last weakness bothering an LCD so far compared with a PDP and a CRT was cleared. Moreover, 4.0 ms MPRT is a number at which people cannot perceive motion blur for moving images under most conditions and therefore the MBR LCD is superior to a PDP by above 50% and equal to a CRT in motion blur.

Moving‐image‐sticking phenomenon induced by an outside force in liquid‐crystal displays

— Image deformation caused by an outside force is observed to remain for hours at high gray levels for liquid-crystal displays (LCDs) in the multi-domain (MD) vertical-alignment (VA) mode. This so-called moving-image-sticking phenomenon demonstrated a non-symmetric luminance profile for the left and right viewing direction for MDVA-mode LCDs which have original symmetric viewing-angle characteristics. The generation of a stable reverse-tilt domain by an outside force was assumed to be the cause of this phenomenon, and the stability of a reverse-tilt domain under an electric fringe field was calculated by changing the electric-fringe-field distribution which determines the LC tilt direction. The domain of a given tilt direction is calculated to change to other tilt direction induced by a fringe field at a low gray condition, but to remain unchanged at a high gray condition. This agrees with the observed trends of duration time of the moving-image-sticking phenomenon.

Increase of Virtual Image Area by Reflection of Mirrors

We propose a new display feature in which the viewing area of a virtual image is larger than the real size of the electronic display by the combination of an original electronic image and reflected images. By controlling the angular light distribution of each pixel, reflected images are made to look different from a direct-view image. Conditions are analyzed by which reflected images and a direct-view image are perceived as one image by the user. Both twofold and fourfold enlargements of the image are experimentally observed at the proposed system using liquid crystal display and mirrors standing by its side.

56.4L: Late‐News Paper: A Reflective Color TFT‐LCD with High Aperture Ratio

A reflective 3.5″ QVGA color TFT-LCD with high aperture ratio (93.5%) and high reflectivity (up to 40–;42%) has been developed. In this panel, we introduced a new pixel design for high aperture ratio and controlled several reflectors for reflecting viewing angle.

4.2: Polymer Network-Stabilized Monostable FLCDs Using Cholesteric-Chiral Smectic C Phase Transition Material

In this paper, we propose a polymer network-stabilized mono-stable FLCDs using Ch-SC* phase transition material. We have confirmed mono-domain characteristics had been kept stable throughout the cycle of temperature transition; from SC* phase to the isotropic phase or Ch phase and back to the SC* phase. This method is quite effective to prevent undesirable generation of random two domains under the thermal treatments. So, additional alignment process that makes mono-domain phase by a DC field is no more necessary. We investigated its EO properties and developed the prototype 14.1″ diagonal full-color display for practical use, the performance of which is reported.